tense and twitchy
too dumbfounded to speak
utterly knackered
wobbly with fatigue
throbbing head
a befuddled state of shock
to feel a stabbing of nerves
to be a bundle of jitters
to feel an inward clutch
to sink into oblivion
to lose one’s grip of sanity
to sound delusional
to feel a lurch of panic
to feel a nervous swoop
one’s heart’s racing
one’s heart plummets
one’s heart starts to thump
one’s voice is wobbling out of control
one’s mind is churning
one’s stomach turns inside outv
one’s legs are wobbling
anger is bubbling up
a blip
a debacle
flummoxed
bowled over
not the most pristine desk
to work in a shambles
to say smth in implacable tones
to get oneself in a pickle
to feel a flicker of alarmv
to feel like punching smth in frustration
to stitch smb up/to be stitched up by smb
to gather one’s wits
to get a grip of oneself
to muster a smile
to wrench one’s mind back to the presentv
to beam with genuine enthusiasm
at a snail’s pace
on the tip of my tongue
like an ebb in the tide
to hear on the grapevine
to come down off one’s high
to keep a lid on the story
to smile through gritted teeth